Valveless pump or compressor



Patented oa. 3o, 192s. x

UNITED s'rarla'sr PAfrlzrrr oF FICE.

'l WILHELM n. BBQNANDEB, or MoNTcLAI-E, NEW JERSEY, AssIGNoR To ,AMERICAN mem a rou'NDnY coMrANY, A conrojna'rIoN 0E NEW JERSEY.'

, tons.

Y VALVELESS PUMP OR COMPRESSOR.

Application led February 3, 1926. Serial No. 85,643.

and then specificallyset forth in the claims hereunto appended.

In the accompanying drawings,' which forma part of this s ecification and in which like characters o reference indicate the same or like parts, Fig. 1 is a sectional elevation of a pump or compressor constructed in accordance with the invention; Fig. 2 is a sectional view taken on the line 2-2 in Fig. 1; Fig 3 is a cross-sectionall View taken on the line 3-3 in Fig. 2; and Figs. 4 to 9 inclusive are diagrammatic views illustrating the operation of the device. f

In carrying the invention into effect, therev is provided a cylinder which may be open at both ends. This cylinder is provided with an inletpport and an outlet port in itsA wall, one on either side of its mid-section. lThere are further provided two pistons working in said cylinder, and means for producing relative differential retreatin movements of said pistons in the region o said inlet port, whereby the gasnor liquid is driven at the same speed and in thesame.

direction of rotation but with one having a lead over the other, in order to produce the necessa differential movements of the pisL he specific structure selected to illustrate the invention is but one of' numerous possible concrete embodiments of the piston 13 is connected by a rod 14, pivotal- I ly attachedto it by means of 'a wristpin 15, to a crank 16 supported by the-'discs 17--17 of a crankshaft 18. Similarly, the righthand pistbn 19 is connected, by means of ay rod 2 0, pivoted on the wristpin 21, toa crank 22 carried by the discs 23-23 .of a

crankshaft 24. The two crankshafts are housed in crankcases 25e-25 which also support the ends of the cylinder 10. Each crankcase has a side cover 26 -for the insertion of the crankshaft, and a hand-hole cover 27 for attaching the connecting rod tothe crank. l

Each of the crankshafts 18 and 24 carries a worm-wheel 28 driven by a worm 29 Ithe shaft 30 of which is supported by a split housin 31 attached to one side of the crankcase. e worm shafts 30 are connected,

by couplings 32, to the shaft of an electric motor 33 which may be directly supported by the base upon which the pump is mounted.

The cranks 16 and 22 are set atksuch an angle, the latter leading, that the pistons 13 and 19 always have a differential movement, moving in opposite directions to produce the vnecessary relative differential retreating movement in the region 'of the inlet port,

movement in the region of the outlet port,

Jduring a part ofthe cycle ofo erations, and

moving in the same direction uring the remainder of the cycle of operations in order to produce the relative differential traveling movement between the inlet port and the outlet port. A

In Fig. 4, the left-handl piston is at its rearmost position while the right-hand piston has already left its foremost position,

lleaving theinlet port wide open for the admission of. a charge to the cylinder. As the pistons move to the right, as indicated by the arrows, but at different speeds, the inlet port closes, Fig. 5, While the outlet port is still covered by the right-hand piston. In Fig. 6, the right-handpiston has reached its rearmost' position and the outlet port is wide open. The left-hand piston at this stage lll ' land operative connections.

of the cycle of operations has not yetA reached its foremost position, so that now the two pistons begin to move in opposite directions, narrowing down the space between their heads as shown in Fig. 7 .until finally they touch, vas in Fig. 8, thereby eX- pelling the remnant of the charge at the moment of closing the outlet port. The right-hand piston now having passed its mid-return position, both pistons move to the left, Fig. 9, thereby gradually opening the inlet port which will be wide open when they arrive at the end of the return stroke. Further movement of the pistons brings them back to the positions shown in Fig.' 4,

whereupon the cycle of operations is repeated.

What is claimed is:4 1. A valveless pump or compressor comprisinga cylinder having an-inlet port and an outlet'port in its wall, two pistons working in said cylinder, and means for producing relative dii'erential retreating move- 'ments of said pistons in' the region of said vments of said pistons in the region of said inlet port to draw a lcharge into said c linder, and relative differential approac 'ng movements of said pistons in the region of said outlet portto expel a charge from said cylinder, and relative, differential traveling movements of said pistons between said ports and between said retreating and approaching movements, said means including two crankshafts one at either end` of said cylinder, a common drive for said crankshafts,

`3. A valveless pump or compressor comprismg a cylmder havmg an lnletl port and an outlet port in its Wall, two pistons working in said cylinder, and two cranks and crankshafts differentially driving said pistons, said cranks being rotative at the same speed but one having a lead over the other.

4. A valveless pump or compressor comprising a cylinder having an inlet port and an outlet port in its wall, two pistons work,- ing in said cylinder, a leading crank and a trailing crank and two crankshafts differentially driving said pistons, and means connecting and driving said cranks-at the same speed.

5. A valveless pump or compressor comprising a cylinder having an inlet port and an outlet port in its wall, two pistons working in said cylinder, a leading crank and al trailing crank and two crankshafts differentially driving said pistons, and electricallydriven worm-gearing connecting and driving said cranks at the same speed.

6. A valveless pump or compressor comprising a cylinder having an inlet port and an outlet port in its wall, two pistons work- -ing in said cylinder, two crankcases supporting said cylinder, a leading crank and a trailing crank respectively working in said crankcases, rods connecting said cranks with said pistns, and electrically-driven wormgearing connecting `and driving said cranks at the same speed.

7. A valveless pump or compressor comprising a cylinder having an inlet port and an outlet port in its wall, two pistons working in said cylinder, two crankcases supporting said cylinder, a -leading crank" and a trailing crank respectively working in said crankcases, rods connecting, said cranks with said pistons, twohousin s associated with said crankca-ses, av set o` worm-gearing in each housing and driving one of said cranks,

" and electrically-driven shafts connecting and driving both sets of worm-gearing at the same speed. i

In testimony whereof, I

name to this s cifcation.

LMB. BRONANDER.

have signed my 

